if(a) break;怎么理解

if(a) break;怎么理解 if(!a) break; if(!a&&!b)break;其中的!a&&! 请问my friends and i drive to the counryside for a weekend break.中的break 怎么理解, if(!base)怎么理解 if(!memcmp)怎么理解 Kobe...If you feel tired,then take a break. 口语：sure for after the spring break 怎么理解 Go break a leg.怎么用? break a break a break a break a If you _____,no one will believe you.A：don’t break your promise B：often keep your promise C：often break promise D：always break your promise if you break up with a traveller was a welcome break in an otherwise dull existen求解析for people in this village,a traveller was a welcome break in an otherwise dull existence.中的a welcome break 和 in an otherwise dull existence该怎么理解? break up,break down,break in,break out,break into,break through怎么区别 only two centimeters higher,___ break the world record,encouraged the coach.A.you will B.and you will选B.答案上说是前面是祈使句,可是为什么不能理解为If条件句的省略形式?谢.